Socalrunner

1986 honda 70 fourtrax carb tuning help

7 posts in this topic

I can only start the quad with starter fluid and it will not stay running. I just cleaned it out and i believe it is the tuning on it is off since i cleaned out the jets. Please help.

Share this post


Link to post
Share on other sites


Sounds like you are not getting fuel if it will start with starting fluid but won't keep running. Have you checked the plug also?

Share this post


Link to post
Share on other sites

Check fuel filter, petcock, gas vent tube. Have you checked all of the lines going from the tank to the carb? Is this fresh gas?

Welcome to the site.

Share this post


Link to post
Share on other sites

Its fresh gas. The plug sparks so i should check all the fuel lines. How should the carb be tuned to?

Share this post


Link to post
Share on other sites

If you have not done any engine mods or moved it to an area where elevation is drastically different, then the jetting should stay stock. I think Bot may be right, you are probably not getting fuel to the carb. Do what he said, also check the float, it could be stuck. Also, when you clean the carb, you need to clean EVERYTHING. Take EVERYTHING apart and clean it. Pay special attention to the idle circuit. Blow all passages that you cannot clean otherwise with compressed air.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now

  • Similar Content

    • By chuckcnm
      Hi, just picked up a MOTO 4 YFM255 and want to replace the rear brake pads. How do I get to the back. Guessing I need to remove the brake disk, question any easy way to do this?
      Thanks
    • By sloundez
      Does anyone out there know where I can get a functional pair of wheel cylinders for subject ATV? Any suggestions welcomed. Thanks
    • By marcuslachance
      I
      I bought a Honda 250sx 1986 but the exhaust is broken. Apparently it's not possible to order a new one. I checked to order one on others compagny but there's noting.
      Do you know which exhaust it's possible to install. Is there a company who sold an exaust to fit on my 250sx.
      Sorry for my english
      Thank you
      Marc
    • By Npeters
      Im working on a old 1987 honda 125 4 wheeler in the school shop. It will start by getting pulled by another 4 wheeler but wont start with the pull start or Electric Start. When you pull start it it tries to start but when you try the electric start it just turns over but doesnt even act like it wants to start. The spark plug is dry and it shoots fuel out of the back(air filter side) of the carb. Weve had the carb off twice and it is complety clean. What are some things we can try?